Which company owns MAC address prefix 00:17:9B?

MAC address prefix 00:17:9B is registered to CHANT SINCERE CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:17:9B has a network interface built by CHANT SINCERE CO.,LTD.

What is the OUI 00:17:9B?

00:17:9B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CHANT SINCERE CO.,LTD. It covers every address from 00:17:9B:00:00:00 to 00:17:9B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-17-9B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:17:9B:00:00:00 that is 00:17:9B — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is CHANT SINCERE CO.,LTD located?

CHANT SINCERE CO.,LTD is listed at 7F-2,NO.188,Sec 3,Ta Tung Rood, Hsi Chih City Taipei Hsien TW 221 in the IEEE OUI registry entry for 00:17:9B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does CHANT SINCERE CO.,LTD own?

CHANT SINCERE CO.,LTD holds 2 OUI prefixes in the IEEE registry, of which 00:17:9B is one. A device made by CHANT SINCERE CO.,LTD could carry a MAC address from any of them.

CHANT SINCERE CO.,LTD

MAC address prefix 00:17:9B is registered to CHANT SINCERE CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with 00:17:9B has a network interface built by CHANT SINCERE CO.,LTD. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from 00:17:9B:00:00:00 to 00:17:9B:FF:FF:FF.

OUI prefix: 00:17:9B
Hyphen form: 00-17-9B
MAC range: 00:17:9B:00:00:00 – 00:17:9B:FF:FF:FF
Addresses in block: 16,777,216
Organization: CHANT SINCERE CO.,LTD
Address: 7F-2,NO.188,Sec 3,Ta Tung Rood, Hsi Chih City Taipei Hsien TW 221
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Other prefixes from CHANT SINCERE CO.,LTD

CHANT SINCERE CO.,LTD holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

B8:16:DB

Assignment history (3)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2016-07-29Assigned to "Chant Sincere CO., LTD."
archived source →
2017-09-08Renamed from "Chant Sincere CO., LTD." to "CHANT SINCERE CO.,LTD"
archived source →
2026-07-17Assigned to "CHANT SINCERE CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after 00:17:9B:

FAQ

Which company owns MAC address prefix 00:17:9B?: MAC address prefix 00:17:9B is registered to CHANT SINCERE CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:17:9B has a network interface built by CHANT SINCERE CO.,LTD.
What is the OUI 00:17:9B?: 00:17:9B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CHANT SINCERE CO.,LTD. It covers every address from 00:17:9B:00:00:00 to 00:17:9B:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-17-9B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:17:9B:00:00:00 that is 00:17:9B — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is CHANT SINCERE CO.,LTD located?: CHANT SINCERE CO.,LTD is listed at 7F-2,NO.188,Sec 3,Ta Tung Rood, Hsi Chih City Taipei Hsien TW 221 in the IEEE OUI registry entry for 00:17:9B. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does CHANT SINCERE CO.,LTD own?: CHANT SINCERE CO.,LTD holds 2 OUI prefixes in the IEEE registry, of which 00:17:9B is one. A device made by CHANT SINCERE CO.,LTD could carry a MAC address from any of them.